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Wheel Cylinder - Correct part question #1334145 Mon Nov 18 2019 12:52 AM
Joined: Jul 2019
Posts: 37
M
morerog Offline OP
Wrench Fetcher
For the 1951 Chevy 3600 (3/4 ton) some sites advertise the same wheel cylinder for front and rear, and other sales sites advertise a different style for front and rear. Who's correct? I've read the descriptions carefully, and read the 1948-1953 Chevrolet Shop Manual (Sections 5-3 and 5-5) and the shop manual images suggest the same wheel cylinder for all wheels. Only asking because I don't have time for returns to an online parts store because they're advertising is wrong. Any suggestions or clarity on this?
Thanks.

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334148 Mon Nov 18 2019 01:06 AM
Joined: Sep 2001
Posts: 28,892
tclederman Offline
Boltergeist


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Wheel Cylinder - Correct part question [Re: morerog] #1334165 Mon Nov 18 2019 02:55 AM
Joined: Jun 2004
Posts: 8,128
W
Wrenchbender Ret. Offline
Master Gabster
According to JC,s part list the 51 3/4 ton trucks used a different wheel cyl. for front & rear. 52 was the last year for Huck brakes on 3/4 & larger trucks. 53 up used Bendix style brakes & are completely different.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334167 Mon Nov 18 2019 03:10 AM
Joined: Jul 2019
Posts: 37
M
morerog Offline OP
Wrench Fetcher
Thanks tclederman for the link. Boy, wish I would have stocked up in the 1950s.... $4.85 list price.

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334178 Mon Nov 18 2019 05:22 AM
Joined: Nov 2005
Posts: 5,519
3
3B Offline
Master Gabster
Hy morerog and guys, According to my United brake catalogue the front and rear wheel cylinders on 3600s from 1946 to1952 are different, fronts are 1 1/4" bore Raybestos p/n WC3406, rears are 1 3/8" bore Raybestos p/n WC4358, hope that helps.

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334185 Mon Nov 18 2019 12:57 PM
Joined: Sep 2001
Posts: 28,892
tclederman Offline
Boltergeist
3B,

The USA MPC shows them to be the same?
casting code 5450822
part number: 5453818

But, replacement parts are 1 1/4" bore and the MPC shows the original bore was 1 1/8" core (I think)?

NOTE added later:
morerog: I suggest following 3B's advice/information.The 1952 Specifications Manual confirms 3B's information (the 1953 Manual is unreadable). The MPC must be incorrect (Or, I am reading it incorrectly)?

Last edited by tclederman; Mon Nov 18 2019 01:05 PM. Reason: note added later

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Wheel Cylinder - Correct part question [Re: tclederman] #1334204 Mon Nov 18 2019 03:11 PM
Joined: Aug 2001
Posts: 1,111
G
Greg_H Offline
Shop Shark
Originally Posted by tclederman
3B,

The USA MPC shows them to be the same?
casting code 5450822
part number: 5453818

But, replacement parts are 1 1/4" bore and the MPC shows the original bore was 1 1/8" core (I think)?

NOTE added later:
morerog: I suggest following 3B's advice/information.The 1952 Specifications Manual confirms 3B's information (the 1953 Manual is unreadable). The MPC must be incorrect (Or, I am reading it incorrectly)?

Rears are the same side to side with the brake lines pointing straight out. The fronts are different in the direction of the brake line pointing as they angle for access and the side to side difference makes them both point the same direction. Wow! I hope I made sense with that explanation.

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334212 Mon Nov 18 2019 04:20 PM
Joined: Nov 2005
Posts: 5,519
3
3B Offline
Master Gabster
Hy Greg_H and guys, in my catalogue the illustrations for both front and rear wheel cylinders show the connection ports facing straight out and list only one part number for the front wheel cylinders and one part number for the rear wheel cylinders.

Re: Wheel Cylinder - Correct part question [Re: morerog] #1334334 Tue Nov 19 2019 01:53 PM
Joined: Jul 2019
Posts: 98
B
Barnfind49 Offline
Shop Shark
I had the exact same drama when i ordered all the brakes for my 49 gmc 150. I checked a bunch of other places and noticed wheel cylinders were listed different for 3/4 tons but then when i called JC they never even asked. I actually asked them and they said they didn’t have anything different listed. I was all worried about it but after a while I decided to just roll with it because i was still moving forward with all the other stuff and i put it all together with the dual master and it all works flawlessly. It actually stops way better than i hoped for. So moral of the story is..... i dont know. BUT the stuff JC sold me is in and working perfect.


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